fix(frontend): finish InboundFormModal rename after atomic swap

The atomic-swap commit landed the new file but the exported function was
still named InboundFormModalNew. Rename to match the file.

frontend/src/pages/inbounds/InboundFormModal.tsx

@@ -147,7 +147,7 @@ function buildAddModeValues(): InboundFormValues {
   });
 }
 
-export default function InboundFormModalNew({
+export default function InboundFormModal({
   open,
   onClose,
   onSaved,